Iono-molecular Separation with Composite Membranes V. Nitro-phenol separation on n-alkyl alcohols supported liquid membranes

2018 ◽  
Vol 69 (5) ◽  
pp. 1084-1088
Author(s):  
Ion Spiridon Din ◽  
Anca Maria Cimbru ◽  
Hussam Nadum Abdalraheem Al Ani ◽  
Ion Marius Nafliu ◽  
Szidonia Katalin Tanczos ◽  
...  
Keyword(s):  
Working Conditions ◽  
Separation Efficiency ◽  
Composite Membranes ◽  
Liquid Membranes ◽  
Phase Flow ◽  
Optimal Parameters ◽  
Supported Liquid Membranes ◽  
Molecular Separation ◽  
Source Phase ◽  
Maximum Separation

In this work are ongoing recent related studies on the separation of nitrophenols by composite membranes using this time an HFCLM membrane based on n-lower alkyl alcohols (C6, C8 si C10) on a well-characterized tubular polypropylene support . The results of nitrophenol separation, at a concentration of 5 mg / L in the source phase of pH 4.8, indicate the following optimal parameters of hydrodynamic regime, solvent and pH: source phase flow of 4.0 L / min, receiver phase rate 0.3 L / min; n-octanol, membrane solvent; the pH of the receiving phase that ensures maximum separation efficiency between 10 and 11; pH that ensures selective separation of m- and p-nitrophenols from m-nitrophenol between 8 and 10.The efficiency of nitrophenol separation through polypropylene capillary polymeric n-alcohol composite membranes reaches more than 90% at established working conditions, but operation below pH 12 will be considered in order not to cause membrane instability on the support.

Iono-molecular Separation with Composite Membranes VI. Nitro-phenol separation through sulfonated polyether ether ketone on capillary polypropylene membranes

2018 ◽  
Vol 69 (7) ◽  
pp. 1603-1607
Author(s):  
Ion Spiridon Din ◽  
Anca Maria Cimbru ◽  
Abbas Abdul Kadhim Klaif Rikabi ◽  
Szidonia Katalin Tanczos ◽  
Simona Ticu (Cotorcea) ◽  
...  
Keyword(s):  
Flow Rate ◽  
Water Solubility ◽  
Composite Membranes ◽  
Membrane System ◽  
Polyether Ether Ketone ◽  
Molecular Separation ◽  
Capillary Membrane ◽  
Sulfonated Polyether Ether Ketone ◽  
Source Phase ◽  
Receptor Phase

The importance of removing and / or separating nitro phenols from aqueous solutions through membranes is substantiated by the multitude of recent research in the field, which broadly justifies both the economic and ecological reasons of such an approach. The present paper outlines the results of the transfer of nitro phenols through a membrane system made up of PPET impregnated polypropylene capillaries (PP) impregnated with sulfonate polyetheretherketone (SPEEK). The experiments were carried out in a PP-SPEEK capillary membrane module, with a useful size of 1 m2. Determinations made by using a 4 L / min flow rate source at a 5 mg / l nitrophenol concentration and pH 5 or pH 7, and the pH 12 receiving phase and a flow rate of 0.3 L / min, revealed that o- and p-nitrophenol were transferred much faster than m-nitrophenol (the flux is nearly double); the source phase of the system is concentrated in m-nitrophenol, and the receptor phase in o- and p-nitro phenols; the transfer data correlates with the higher water solubility of m-nitrophenol; mono nitro phenols transfer much faster than di nitrophenol, but both the mono and di nitrophenol streams decrease over time; after 4-5 hours of work, the mono nitrophenol concentration triples in the receiving phase, while the 2,4-dinitrophenol concentration doubles in the source phase.

Iono-molecular Separation with Composite Membranes II. Preparation and characterization of polysulphone and composite nanoparticles

2017 ◽  
Vol 68 (2) ◽  
pp. 203-209
Author(s):  
Hussam Nadum Abdalraheem Al Ani ◽  
Anca Maria Cimbru ◽  
Corneliu Trisca-Rusu ◽  
Szidonia Katalin Tanczos ◽  
Adriana Cuciureanu ◽  
...  
Keyword(s):  
Chemical Species ◽  
Composite Membranes ◽  
Ammonium Persulfate ◽  
Operating Pressure ◽  
Polysulfone Membrane ◽  
Polymeric Nanoparticle ◽  
Molecular Separation ◽  
Copper Complexation ◽  
Molecular Separations ◽  
Methyl Pyrrolidone

This paper illustrates the possibility of producing iono-molecular separations using ionic colloidal ultrafiltration membrane of polysulfone synthetic solutions of cupric ions and nitro phenols through ultrafiltration assisted by polymeric nanoparticle composites based on polysulfone. In the present work, in order to reduce the operating pressure and increase the flow of water we are using the process of ultrafiltration through a polysulfone membrane in N-methylpyrrolidone 10% prepared by coagulation in isopropanol. The nanoparticles needed in colloidal ultrafiltration had been obtained through the immersion technique of precipitation of a solution of 5% PSf in N-methyl pyrrolidone containing 3% aniline in lower alcohols: methanol, ethanol, and isopropanol, followed by the oxidation of the remaining aniline in a solution of 10% hydrochloric acid and ammonium persulfate. The Nanoparticles of polysulfone (NP-PSf) and The three obtained variants of nanoparticles composites (NP-PSf-PANI) were morphologically (SEM) and (AFM), structurally and compositionally (FTIR) characterized and the results show that nanoparticles polysulfone have a much lower range than the composites. The Possibility of copper complexation by both nitrophenols, and by nanoparticle surface probably lead to the formation of more stable aggregates in the supply, which can sufficiently justify the increased retention. The Retentions of the chemical species in question use in all the tests made the same series:R NP-PSf-PANI-M] R NP-PSf-PANI-E] R NP-PSf-PANI-P] R NP-PSf

Selective permeation of 90Y from a mixture of 90Y/90Sr through diglycolamide impregnated supported liquid membranes

2021 ◽  
Vol 170 ◽  
pp. 109604
Author(s):  
Rohit Kumar ◽  
S.A. Ansari ◽  
Pankaj Kandwal ◽  
P.K. Mohapatra
Keyword(s):  
Liquid Membranes ◽  
Supported Liquid Membranes

Enantioseparation of Enantiomers across Hollow Fiber Supported Liquid Membranes

2012 ◽  
Author(s):  
Dushu Huang ◽  
Wei Liu ◽  
Zhaolong Huang ◽  
Yashun Chen ◽  
Jing Wang ◽  
...  
Keyword(s):  
Hollow Fiber ◽  
Liquid Membranes ◽  
Supported Liquid Membranes

Formation of semi-permeable polyamide skin layers on the surface of supported liquid membranes

1998 ◽  
Vol 147 (1) ◽  
pp. 109-116 ◽  
Author(s):  
Yuchun Wang ◽  
Yonathan S. Thio ◽  
Fiona M. Doyle
Keyword(s):  
Liquid Membranes ◽  
Supported Liquid Membranes

Supported liquid membranes with feed dispersion for recovery of Cephalexin

2014 ◽  
Vol 468 ◽  
pp. 423-431 ◽  
Author(s):  
Zisu Hao ◽  
Michael E. Vilt ◽  
Zihao Wang ◽  
Weidong Zhang ◽  
W.S. Winston Ho
Keyword(s):  
Liquid Membranes ◽  
Supported Liquid Membranes
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